大学英语四级词汇活记活用(第五期)

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1,Lung cancer, like some other cancers, often doesn’t produce ________ until it is too late and has spread beyond the chest to the brain, liver or bones.
  A) trails
  B) therapies
  C) symptoms
  D) symbols
  题目相关单词解释(提示:做完题目再看):
  trail:n. 踪迹,小径,尾;v. 拖,尾随,追踪
  therapy:n. 治疗
  symptom:n. 病症,症候,征兆,表征
  symbol:n. 象征,符号,标志
  2,With the increasing unemployment rate, workers who are 50 to 60 years old are usually the first to be ________.
  A) laid off
  B) laid aside
  C) laid out
  D) laid up
  题目相关单词解释(提示:做完题目再看):
  lay off:解雇;停止做
  lay aside:把...搁置一旁;储存
  lay out:安排,布置;摆出,展开
  lay up:使卧床不起
  3,The physical differences between men and women can be ________ directly to our basic roles as hunters and child-bearers.
  A) pursued
  B) traced
  C) switched
  D) followed
  题目相关单词解释(提示:做完题目再看):
  pursue:v.追捕,追求,继续从事
  trace:n. 踪迹,痕迹;vt. 跟踪,追踪;追溯,探索;临摹
  switch:n. 开关,突然转变;v. 改变,交换
  follow:vt. 跟随,追赶,沿着…前进,仿效;vi. 跟随,紧接
  4,It is clear that the dog has a much greater ________ of its brain devoted to smell than is the case with humans.
  A) composition
  B) compound
  C) percent
  D) proportion
  题目相关单词解释(提示:做完题目再看):
  devote:vt. 将…奉献(给),致力于
  composition: n. 作文,著作,组织
  compound:n. 混合物,复合字;a. 复合的,混合的,合成
  percent: n. 百分比,百分数
  proportion:n. 比例,率,份儿,部分,均衡,调和;vt. 使成比例,使均衡
  5,American college students are increasingly ________ with credit card debt and the consequences can be rather serious.
  A) boosted
  B) burdened
  C) discharged
  D) dominated
  题目相关单词解释(提示:做完题目再看):
  increasingly:ad. 日益地,愈加地
  consequence:n. 结果,后果
  boost:n. 推进,支援;v. 推进,提高
  burden:n.重负,负荷;重担v.使负重,装载;加重压于,烦扰
  discharge:v. & n. 排出,放出,允许…离开,释放,放电
  dominate:vt. 支配的,统治,控制,高出于,居高临下;vi. 居支配地位,处于最重要的地位

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